The Nokaut Offers Box WordPress plugin through 1.4.0 does not sanitize and escape some of its settings, which could allow high-privilege users such as admin to perform Stored Cross-Site Scripting attacks even when the unfiltered_html capability is disallowed (for example in multisite setup)
https://wpscan.com/vulnerability/17afba70-f213-47f6-aea2-59288ca92549/